Arm brace



FIG. 1 is a front elevation of a preferred form of the arm brace;

FIG. 2 is a right side elevation of the FIG. 1 arm brace, the left side elevation being the same;

FIG. 3 is a lower end elevation of the FIG. 1 arm brace, the upper end elevation being the same; and,

FIG. 4 is a perspective view of the FIG. 1 arm brace. 

The ornamental design for an arm brace, as shown and described. 